عنوان المقالة:تحضير ودراسة طيفية لمعقدات فلزية جديدة مع ليكاندات رباعية الاسنان نوع N2S2 New metal complexes of N2S2 tetradentate ligands: Synthesis and spectral studies
محمد جابر الجبوري/ حسام حيدر الطويل/ رياض محمود احمد
English Authors
Mohamad Jaber Al-Jeboori , Husam H. Al-Tawel, Reyadh Mahmood Ahmad
Abstract
New tetradentate ligands 2-(2-mercaptoethylthio)-N-(pyridin-2-ylmethyl)acetamide H2L1 and 2-chloro-
2-(2-mercaptoethylthio)-N-(pyridin-2-ylmethyl)acetamide H2L2 were synthesised from the reaction of 2-
aminomethanepyridine with 1,4-dithian-2-one and 3-chloro-1,4-dithian-2-one, respectively. Monomeric
complexes of these ligands, of general formulae K[CrIII(Ln)Cl2], K2[MnII(Ln)Cl2] and [M(Ln)] (M = Fe(II),
Co(II), Ni(II), Cu(II), Zn(II), Cd(II) or Hg(II); n = 1, 2) are reported. The mode of bonding and overall geometry
of the complexes were determined through IR, UV–Vis, NMR and mass spectral studies, magnetic
moment measurements, elemental analysis, metal content and conductance. These studies revealed octahedral
geometries for the Cr(III), Mn(II) complexes, square planar for Ni(II) and Cu(II) complexes and tetrahedral
for the Fe(II), Co(II), Zn(II), Cd(II) and Hg(II) complexes. The study of complex formation via
molar ratio in DMF solution has been investigated and results were consistent to those found in the solid
complexes with a ratio of (M:L) as (1:1).
رياض محمود احمد | Riyadh Mahmood Ahmed | 11080